Hi, Justo All shadowmapping techniques have problems with such aliasing problems. You can try use shadow volumes technique as it dont suffer from this problem and generates correct shadows in any case, but it have other drawbacks. IIRC this algo also implemented in osgShadows.
Cheers, Sergey. 25.08.2011, 22:12, "Justo Ureña" <[email protected]>: > Hi, > > I´m testing diferent shadows techniques for my scene, and after some adjusts, > I got them working fine... Except for very big aliasing that appears in some > surfaces that are parallel to the light direction. It happens in all the > shadow maps techniques (ShadowMap, StandardShadowMap, LISPSM)... and I´ve > tried all the things that I could imagine to get rid of them without > success... Please, anyone can help me with that? > > From my investigation I got that the problem is that the depth map calculated > by the shadow camera does not fit exactly with the curved shape in the scene. > In the attachment you can see a render of the scene (that only includes the > cessna and a vertical directional light that produces the shadow) coloured > with the depth map. As you can see, in the laterals of the cessna appear > these withe stiches that means that the depth calculated in these texels of > the map is infinite, what is obviously wrong. There is any way to avoid this > annoying effect? > > Thank you very much! > > Cheers, > Justo > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=42241#42241 > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
